A few minutes ago while looking for a new laptop i had this idea- get a Mac. My next thought was about gentoo and linux in general, what is the state of gentoo\linux on the new x86 macs?_________________"to be yourself is all that you can do"

Forget about the EFI or BIOS question.
The firmware update to allow bootcamp booting windows provides BIOS emulation or something.

I boot gentoo using a the regular lilo(grub suppossedly will bork the partition table), and refit, refit.sourceforge.net.

This way lets you use the ati drivers to get hardware acceleration.

The only negative effect of the mac not using a BIOS now is that your limited to creating four primary partitions. One being a 200mb efi related partition.
EFI uses GPT which doesn't support extended partitions, and the BIOS MBR table doesn't allow more the four primary partitions.

I have efi partion, OS X, Linux, and a fat32 data share partition. I would normaly create separate swap, /boot, and /home partitions.

I have a macbook pro. The sound only works on headphone jack. I have not succeeded in getting the synaptics driver to work. Keyboard support needs improvement: fn key+arrow keys should be the home, end, pgup, and pgdown keys. The alt key is next to ctrl instead of space bar, but that's easy to fix.